diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/i386/drivers/net/undinet.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/src/arch/i386/drivers/net/undinet.c b/src/arch/i386/drivers/net/undinet.c index a98d09d64..822afa7b7 100644 --- a/src/arch/i386/drivers/net/undinet.c +++ b/src/arch/i386/drivers/net/undinet.c @@ -182,9 +182,6 @@ static int undinet_call ( struct undi_nic *undinic, unsigned int function, */ gateA20_set(); - /* Copy parameter block back */ - memcpy ( params, &undinet_params, params_len ); - /* Determine return status code based on PXENV_EXIT and * PXENV_STATUS */ @@ -199,10 +196,30 @@ static int undinet_call ( struct undi_nic *undinic, unsigned int function, rc = -EIO; } + /* If anything goes wrong, print as much debug information as + * it's possible to give. + */ if ( rc != 0 ) { + SEGOFF16_t rm_params = { + .segment = rm_ds, + .offset = (intptr_t) &__from_data16 ( undinet_params ), + }; + DBGC ( undinic, "UNDINIC %p %s failed: %s\n", undinic, undinet_function_name ( function ), strerror ( rc ) ); + DBGC ( undinic, "UNDINIC %p parameters at %04x:%04x length " + "%#02x, entry point at %04x:%04x\n", undinic, + rm_params.segment, rm_params.offset, params_len, + undinic->entry.segment, undinic->entry.offset ); + DBGC ( undinic, "UNDINIC %p parameters provided:\n", undinic ); + DBGC_HDA ( undinic, rm_params, params, params_len ); + DBGC ( undinic, "UNDINIC %p parameters returned:\n", undinic ); + DBGC_HDA ( undinic, rm_params, &undinet_params, params_len ); } + + /* Copy parameter block back */ + memcpy ( params, &undinet_params, params_len ); + return rc; } |